Tomorrow morning, the moon and Jupiter will be in close conjunction. Two mornings later, the waning moon passes near Saturn. StellariumHappy Earth Day, too! Earth’s still my favorite planet. The only one you where you can inhale deeply and smell a season. After watching the sky for years, you start thinking about our planet as more of a mobile observatory, cycling around the sun with ever-changing vistas of the stars, moon and planets.Like the Giving Tree in the Shel Silverstein’s book of the same name, we ask much of the Earth, and it gives generously. Tomorrow morning for instance. The waning gibbous moon will team up with the bright planet Jupiter. You can watch them rise together around midnight when they’ll be a little more than 2° apart. For an even more amazing view, rise at dawn tomorrow when they’ll be only 1.3 moon-diameters apart. Steadily-held or tripod-mounted 10x binoculars will show up to four of Jupiter’s moons. Make sure you focus the planet as sharply as possible to accomplish this feat. Then swing by the moon for a look at its crinkly craters.This illustration shows the moon and Jupiter — with its four bright moons — ...